package com.itheima.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.itheima.mapper.ArticleMapper;
import com.itheima.pojo.Article;
import com.itheima.pojo.PageBean;
import com.itheima.service.ArticleService;
import com.itheima.utils.ThreadLocalUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;
import java.util.Map;

@Service
public class ArticleServiceImpl implements ArticleService {

	@Autowired
	private ArticleMapper articleMapper;

	@Override
	public void add(Article article) {
		//补充属性值
		article.setCreateTime(LocalDateTime.now());
		article.setUpdateTime(LocalDateTime.now());

		Map<String, Object> map = ThreadLocalUtil.get();
		Integer userId = (Integer) map.get("id");
		article.setCreateUser(userId);

		articleMapper.add(article);
	}

	//文章分类列表查询
	@Override
	public PageBean<Article> list(Integer pageNum, Integer pageSize, Integer categoryId, String state) {
		//1.创建PageBean对象
		PageBean<Article> pb = new PageBean<>();

		//2.开启分页查询 PageHelper
		PageHelper.startPage(pageNum, pageSize);

		//3.调用mapper
		Map<String, Object> map = ThreadLocalUtil.get();
		Integer userId = (Integer) map.get("id");
		List<Article> as = articleMapper.list(userId, categoryId, state);
		//Page中提供了方法,可以获取PageHelper分页查询后 得到的总记录条数和当前页数据
		Page<Article> p = (Page<Article>) as;

		//把数据填充到PageBean对象中
		pb.setTotal(p.getTotal());
		pb.setItems(p.getResult());
		return pb;
	}

	//获取文章详情
	@Override
	public Article findById(Integer id) {
		Article article = articleMapper.finsById(id);
		return article;
	}

	//更新文章
	@Override
	public void update(Article article) {
		articleMapper.update(article);
	}

	//删除文章
	@Override
	public boolean deleteById(Integer id) {
		Article article = articleMapper.finsById(id);
		if (article != null) {
			articleMapper.deleteById(id);
			return true;
		}
		return false;
	}
}
